AM05-14-003 赤外線サーモグラフィーによる非定常熱伝達測定 : 極薄白金箔を伝熱面とした場合の周波数応答(乱流熱物質移動および反応流1,一般講演)

概要

論文の詳細を見る
A technique for the measurement of time-spatial characteristics of heat transfer to air has been developed using infrared thermograph. In this work, a thin platinum leaf of 0.15μm thick was employed as the test surface in order to improve the frequency response. The time constant was evaluated experimentally by imposing a stepwise change to the input heat flux under a condition of steady flow. The obtained response curve was compared to that of the analytical and numerical results, showing much better frequency response compared to the metallic foil previously used. In order to demonstrate the applicability of the platinum leaf to the practical measurement, the unsteady heat transfer on the wall of a turbulent boundary layer was measured. The unsteady behavior caused by the streak structure formed in the near-wall region was clearly visualized.
日本流体力学会の論文
2005-09-05